Lock



E. N. JACOBI LOCK Filed Oct. 16; 195 7 Sheets-Sheet 1 E. N. JACOBI March 15, 1938.

LOCK

Filed Oct. 16, 1937 3 Sheets-Sheet 2 1% E. N. JACOBH 231L214 LOCK Mach

Filed Oct. 16, 1937 3 Sheets-Sheet 3 Patented Mar. 15, 1938 LOCK Edward N. Jacobi, Milwaukee, Wis., assignor tov Briggs 8; Stratton Corporation, Milwaukee, Wis., a corporation of Delaware Application October 16, 1937, Serial No. 169,404

14 Claims.

This invention relates to looks and refers particularly to what is known in the art as pillar looks. A

In locks of this type, the rotatable cylinder drives a shaft which is connected thereto through a universal joint. Heretofor-e, this universal joint connection between the cylinder and shaft has lacked strength, has been difficult to produce, especially in the smaller types of locks, and was more or less unsightly in appearance.

It is therefore an object of this inventionto improve the construction of locks of this character, particularly with respect tothe formation of the universal joint connection between the cylinder and the shaft so as to overcome the objections to pastconstructions.

With a view toward increasing the strength of the lock, it is an object of this invention to form the driven part of the shaft through which 20 the cylinder transmits rotation to the shaft, di-

rectly as a part of the shaft.

1 To attain simplicity, the invention has as another. of its objects to provide a universal joint connection between the cylinder and shaft which is so designed and constructed that no other parts except the three major elements of the lock, namely, the cylinder, its casing, and the shaft, are required, thus eliminating all additional parts and producing a simplified and less expensive construction.

With the above and other objects in view which Will appear as the description proceeds, this invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described, and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

The accompanying drawings illustrate one complete example of the physicalembodiment of the invention constructed in accordance with the best mode so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a side view of a lock embodying this invention withparts thereof brokenaway and in section;

Figure 2 is a cross sectional View taken through Figure ion the plane of the line Z2, with the shaft and cylinder shown at one of their limits of rotation;

Figure 3 is a view similar to Figure 2, but showing the shaft and cylinder at their opposite limits of rotation;

Cal

1 Figure 4 is a longitudinalsectional view through 1 the inner end of the lock to show the specific construction of the universal joint;

Figure 5 is an inner end view of the lock with the shaft shown in section;

Figure 6 is a perspective View of the inner end 5 portion of the cylinder and the adjacent end of the shaft shown separated;

Figure 7 is a perspective looking into the inner end of the casing;

Figures 8 and 9 areviews to illustrate the manner in which the shaft is assembled with the cylinder; and

Figure 10 is a View similar to Figure 1, but illustrating a slightly modified manner of forming the universal joint connection between the cylinder and shaft.

Referring now particularly to the accompanying drawings in which like numerals indicate like parts throughout the several views, the numeral 5 designates the casing of the lock and in which the cylinder 6 is rotatably mounted. The casing has a main bore 1 to receive the cylinder which is inserted from the rear of the casing. At its inner end the casing has two counterbores 8 and 9, the former being the smaller of the two and receiving an enlarged inner end portion [0 of the cylinder, and the latter receiving an annular flange II on the inner extremity of the enlarged inner end portion of the cylinder.

The cylinder is equipped with the customary tumblers 12 for securing the cylinder against rotation in its casing. The tumblers, as is customary, are acted upon by a key It to free the cylinder for rotation, and in view of the particular construction of the locking parts, the key is insertable and removable only when the cylinder is in one position of rotation. In other words, the cylinder turns through three hundred and sixty degrees -in traveling from locked to unlocked position.

An insert I4 disposed in a transverse slot in the casing enters an annular groove l5 in the enlarged inner end portion of the cylinder to hold the cylinder against axial displacement in the casing.

Rotation of the cylinder is imparted to a shaft l 6 through a novel universal joint connection between these two parts. The shaft emerges from a hole I7 in the flange ll of the cylinder and is free to move angularly in all directions with respect to the axis of the look through a, comparatively wide angle; and as will be hereinafter described, the universal driving connection between the cylinder and shaft is so designed that while the cylinder makes one complete turn, the shaft is rotated only one hundred and eighty degrees.

tion inwardly of its outer end being engageable by the bottom wall 22 ofthe slot, it follows that in ing manner.

The manner in which the universal driving connection is established between the cylinder and the shaft will now be described. a

The end of the shaft which is attached to the cylinder has a foot I8 projecting radially therefrom and formed as an integral part of the shaft by bending the same 'at right angles. the foot, it is given a rectangular cross section so that it has fiat parallel side walls l9 extending from the heel at which it is attached to the shaft, outwardly to the toe.

The extreme outer end portion or toe of the foot is projected forwardly as at 20, and preferably, though not necessarily, this forward projection is arcuate with its radius struck from the axis of the shaft, as best shown in Figures 2 and 3.

The enlarged inner end portion I0 of the cylinder has an open transverse slot 2| directly ahead of its flange into which the hole I! opens. The bottom 22 of this open transverse slot forms a chord to the diameter of the enlarged inner end portion of the cylinder lying beneath the center of the cylinder a distance equal to half the width of the foot IS on the shaft so that when the shaft is assembled with the cylinder, and the foot is disposed in the slot 2|, either of its flat side walls l9 can be in surface to surface engagement with the bottom of the slot while the axis of the shaft coincides with that of the cylinder.

To facilitate the insertion of the foot l8 through the hole I! and into the slot 2|, the outer edge of the hole I! is notched as at 23 and the inner wall of the slot 2| has a notch 24, and to allow a wide angle of misalignment for the shaft without entailing too sloppy a fit, the outer portion of the hole I! is preferably enlarged, as shown, leaving its inner edge lying close to the cylindrical wall of the shaft. The manner in which the foot of the shaft is inserted through the hole I1 and disposed in the notch is clearly shown in Figures 8 and 9. g

The connection between the cylinder and the shaft, as described, has one hundred and eighty degrees of lost motion so that when the cylinder is given a complete turn, the shaft is carried through only one hundred and eighty degrees, and to limit the rotation of the shaft to this distance, the opposite faces I9 of its foot are engageable with stops 25 and 25' carried by the casing.

, The stops 25 and 25 are formed in the follow- As best shown in Figures 1 and '7, the large counterbore 9 is stepped as to depth, having a shallow part 26 which receives the flange H on the inner extremity of the cylinder, and a deep part 21 which extends far enough in from the mouth of the counterbore to accommodate the forwardly projecting toe 20 on the foot of the shaft. The risers or junctures between the shallow and deep parts of the counterbore 9 form the stops 25 and 25'. a

These stops are so disposed as to lie on a plane which, when the cylinder is in one position of rotation, coincides with the bottom of the transverseslot 2 and when the cylinder is inia diametrically opposite position of rotation, is spaced from the bottom wall of the slot a distance equal to the width of the foot I8.

The outer extremity of the foot I8 being engageable with the stops 25 and 25, and its porturning the cylinder from one limit of rotation to the other, the foot will be carried from engagement with one stop into engagement with the In forming other while the cylinder continues to complete its full turn.

This construction affords maximum accuracy in defining the locked and unlocked positions of the cylinder, for the actual stop which arrests the cylinders rotation is spaced a considerable distance out from the axis of rotation.

, To prevent detachment of the shaft when its foot is in line with the notches 23 and 24, its toe 29 engages over an arcuate lip or ridge 28 which projects up from the bottom of the deep part 21 of the counterbore 9 and extends from the stop 25 to the stop 25.

Rotation of the shaft is transmitted to the part to be actuated by means of a square or polygonal head 29 on the outer extremity of the shaft, this head being preferably formed by upsetting the cylindrical cross section of the shaft.

While the normal clearance between the parts is ordinarily sufiicient to permit free angular motion of the shaft with respect to the cylinder throughout its whole permitted angular range, greater freedom can be given the shaft without increasing the clearances by forming the toe portion of the foot l8 with curved side walls I9, as shown in Figure 10. With this formation of the toe, the clearances can be less, and greater accuracy in the arresting of the cylinders rotation isachieved.

From the foregoing description taken in connection with the accompanying drawings, it will be readily apparent to those skilled in the art, that this invention provides an exceedingly simple manner of establishing a universal joint connection between a rotatable lock cylinder of a pillar lock and its shaft, and that it results in a stronger construction than has heretofore been possible, and by virtue of the reduced number of parts, effects a simpler and cheaper assembly.

What I claim as my invention is:

1. In a lock: a bored casing having a counterbore in its inner end; a cylinder rotatable in the bore; a flange on the inner extremity of the cylinder substantially closing the counterbore; the cylinder having an open transverse space adjacent to its flange; and the flange having a hole communicating with said space; a shaft having an angularly directed portion extending through said hole and. disposed in said space, said angularly directed portion of the shaft being engageable by certain walls of the space to transmit rotary motion from the cylinder to the shaft, said angularly directed portion projecting beyond the cylindrical surface of the cylinder ahead of its flange so as to move within the casing counterbore; and angularly spaced abutments on the casing engageable by said angularly bent part of the shaft to limit rotation of the shaft and cylinder.

2. In a pillar lock of the character described: a rotatable lock cylinder having an open transverse slot adjacent to its inner end and having a hole in its inner extremity opening to said slot; a shaft to be driven by the cylinder; and a foot bent angularly from one end of the shaft disposed in said open slot with the shaft protruding through said hole, said foot being engageable by the bottom of the slot for the transmission of rotation from the cylinder to the shaft.

3. In a look: a casing having a bore; a cylinder rotatable in the bore and having a transverse recess and. a hole leading thereto from one end of the cylinder; a shaft having a radially projecting part on one end projecting through said hole with its radially projecting part disposed in the recess to be engageable by certain walls thereof for the transmission of rotation from the cylinder to the shaft; and stop abutments within the bore engageable by said radially projecting part of the shaft to limit rotation of the shaft and cylinder.

4. In a lock: a casing having a bore; a cylinder rotatable in the bore and having a transverse recess and a hole leading thereto from one end of the cylinder, said recess having wall surfaces providing angularly spaced driving abutments; a shaft having a radially projecting part loosely fitted in said hole with its radially projecting part in therecess to be engageable by said driving abutments for the transmission of rotation from the cylinder to the shaft, said radially projecting part of the shaft extending beyond the circumference of the cylinder; and spaced stop abutments carried by the casing for engagement with the projecting end portion of the radially disposed part of the shaft to limit rotation of the shaft and cylinder.

5. In a look: a casing having a bore enlarged at one end; a cylinder rotatable in the bore and having an open transverse recess in its end portion positioned within the enlarged end of the bore and having a hole leading therethrough from said end of the cylinder; a shaft loosely fitted in said hole; a radially projecting foot on said shaft disposed within the open recess with its outer end projecting from the mouth of the recess to extend beyond the surface of the cylinder and into the enlarged part of the bore, the bottom of the recess being engageable with the opposite sides of the radially projecting foot to transmit rotation from the cylinder to the shaft; and stop abutments within the enlarged portion of the bore engageable with the outer end of the foot to limit rotation of the cylinder and the shaft.

6. In a lock: a casing having a bore enlarged at one end; a cylinder rotatable in the bore and having an open transverse recess in its part disposed within the enlarged end portion of the bore and having a hole leading to said recess from the adjacent end of the cylinder; a shaft loosely fitted in said hole; a radially projecting foot on the shaft disposed within saidopen recess, the recess having a greater angular dimension than the width of said foot so that the shaft and cylinder are free to turn with respect to each other and whereby rotation of the cylinder is transmitted to the shaft after taking up the lost motion in the connection therebetween; and stop abutments carried by the casing and projecting into the enlarged portion of its bore to engage said radial foot on the shaft and limit its rotation and that of the cylinder.

'7. In a look: a casing having a bore enlarged at one point; a cylinder rotatable in the bore and having a transverse open slot in its portion disposed within the enlarged part of the bore and having a hole leading tothe slot from the adjacent end of the cylinder; a shaft having a radial projection on one end loosely fitted in said hole with its radial projection received in the slot so that the engagement of the bottom of the slot with opposite sides of the projection provides a lost motion driving connection between the cylinder and shaft for the transmission of rotation from the cylinder to the shaft while allowing angular misalignment between the shaft and cylinder; and means within the enlarged part of the bore and carried by the casing for preventing separation of the cylinder and shaft as long as the cylinder is. assembled with the casing.

8. In a lock: a casing having a bore enlarged at one point; a cylinder rotatable in the bore and having a transverse open slot in itsportion disposed within the enlarged part of the bore and having a hole leading to the slot from the adjacent end of the cylinder; a shaft having a radial projection on one end loosely fitted in said hole with its radial projection received in the slotso that theengagement of the bottom of the slot with opposite sides of the projection provides a lost motion driving connection between the cylinder and shaft for the transmission of rotation from the cylinder to the shaft while allowing angular misalignment between the shaft and cylinder; means within the enlarged part of the bore and carried by the casing for preventing separation of the cylinder and shaft as long as the cylinder is assembled with the casing; and other means carried by the casing and projecting into the enlarged part of the bore for engagement with the radial projection of the shaft to limit rotation of the cylinder and shaft.

9. In a lock: a casing having a bore; a lock cylinder rotatable therein and having an open transverse slot and a hole leading therethrough; a shaft having a radially projecting foot loosely engaged in said hole with its radial foot disposed in the open transverse slot; the wall of the slot opposite the hole being notched to enable assembly of the shaft with the cylinder; and means carried by the casing to close said notch and prevent disassembly of the shaft from the cylinder as long as the cylinder remains assembled with the cas- 10. In a look: a casing having a bore; a lock cylinder rotatable therein and having an open transverse slot and a hole leading therethrough; a shaft having a radially projecting foot loosely engaged in said hole with its radial foot disposed in the open transverse slot; the wall of the slot opposite the hole being notched to enable assembly of the shaft with the cylinder; and means carried by the casing inside its bore engageable with the outer end of said radially projecting foot on the shaft to hold the same against movement to a position necessary for disassembling the same from the cylinder.

11. In a lock: a casing having a bore counterbored at one end; a cylinder rotatable in the bore and having an open transverse slot in its portion which is disposed within the counterbore and having a hole leading therethrough from the adjacent end of the cylinder, the bottom of said slot providing angularly spaced driving abutments; a shaft having a radially projecting foot loosely fitted in said hole with its foot disposed within the slot and engageable by said driving abutments for the transmission of rotation from the cylinder to the shaft, said driving abutments being angularly spaced apart a distance greater than the width of the foot so that the driving connection has lost motion; and stop abutments within the counterbore of the casing engageable with said radially projecting foot to limit rotation of the shaft and cylinder.

12. In a lock of the character described: a casing having a bore; a lock cylinder rotatable therein and having a recess near its inner end and a hole leading thereto from the adjacent inner end of the cylinder, said recessed part of the cylinder being wholly disposed within the casing; and a driven shaft projecting from the hole in the inner end of the cylinder and having means thereon disposed within the recessto cooperate with the walls of the recess in providing a lost motion driving connection for the transmission of rotation from the cylinder to the shaft while allowing substantial angular misalignment between the shaft and the cylinder.

13. In a lock of the character described: a casing having a bore; a lock cylinder rotatable therein and having a recess near its inner end and a hole leading thereto from the adjacent inner end of the cylinder, said recessed part of the cylinder being wholly disposed within the casing; a driven shaft projecting from the hole in the inner end of the cylinder and having means thereon disposed within the recess to cooperate with the walls of the recess in providing a lost motion driving connection for the transmission of rotation from the cylinder to the shaft while allowing substantial angular misalignment between the shaft and the cylinder; and means carried by the casing engageable with the part of the shaft disposed within the recess for preventing disassembly of the shaft from the cylinder as long as the cylinder remains assembled with the casing.

- 14. In a pillar lock of the character described: a rotatable lock cylinder having a transverse recess adjacent to its inner end and having a hole in its inner extremity opening to said recess; a shaft to be driven by the'cylinder; and a foot bent angularly from one end of the shaft disposed in said transverse recess with the shaft protruding through said hole; said shaft being substantially cylindrical and the foot having a substantially rectangular cross section with its width at least as great as the diameter of the shaft so that the opposite sides of the foot are flatly engageable by the bottom of the transverse recess for the transmission of rotation from the cylinder to the shaft.

EDWARD N. JACOBI. 

